KR19990032155A - TV Channel Switching Method to Prevent Duplicate Output - Google Patents

Abstract

The present invention relates to a channel switching method in a television. More specifically, when a channel is changed to another channel by up / down, a channel in which different broadcasts are output is avoided by avoiding a channel in which the same content as the channel before the change is output. A channel switching method of a television for preventing the output of redundant channels for selection.

The channel switching method of the TV for preventing duplicated output of the present invention includes a tuner (2) for tuning a specific broadcast from a broadcast signal received by the antenna (1), and an intermediate frequency signal (IF) output from the tuner (2). IF amplification section 3 for amplifying and P / S separation section for separating the IF video signal output from the IF amplification section 3 into an image intermediate frequency signal PIF and an audio intermediate frequency signal SIF ( 4) and an image signal detector 6 which detects an image signal from the PIF signal output from the P / S separation unit 4 and outputs the image signal to the switching unit 11, and is output through the switching unit 11. An OSD generating apparatus according to an image processor 16 for processing an image signal and outputting R, G, B and luminance signals, and an image signal output from the image processor 16 and a control signal from the microcomputer 9; A mixer 17 for synthesizing the characters outputted from 15) and outputting them to the CRT 19, and a remote controller for remote control. In the television including the cone device 7, when the channel up / down key input by the viewer is detected, the first step of outputting a control signal from the microcomputer 9 to store output data output from the image processor 16; ; A second step of tuning the broadcast tuned by the viewer by outputting a control signal from the microcomputer 9 to the tuner 2 after the output data is stored; A third step of storing the output data of the changed channel output from the image processor 16 after being tuned and output by the tuner 2 and being processed; A fourth step of comparing the previously changed channel data stored in the first step with the changed channel data stored in the third step in the microcomputer (9); And as a result of the comparison between the two channels in the microcomputer 9, the up / down channel is displayed through the CRT 19 if it is not the same channel data, and if the same channel data, the control signal is output from the microcomputer 9 to generate a third signal. And a fifth step of up / down to another channel and returning to the second step.

Description

TV Channel Switching Method to Prevent Duplicate Output

The present invention relates to a channel switching method in a television. More specifically, when a channel is changed to another channel by up / down, a channel in which different broadcasts are output is avoided by avoiding a channel in which the same content as the channel before the change is output. A channel switching method of a television for preventing the output of redundant channels for selection.

Conventionally used televisions receive not only VHF and UHF signals, which are wireless transmission signals, but also cable television signals, and output signals from specific broadcasting stations by channel selection by the viewer. Since various types of television signals are input, channels may be overlapped to output the same broadcast on different channels.

1 is a schematic configuration diagram of a conventional TV, reference numeral 1 denotes an antenna for receiving an over-the-air broadcast signal, and 2 denotes a tuner for tuning the broadcast signal received by the antenna 1; Is an IF amplifier for amplifying the intermediate frequency signal (IF signal) output from the tuner 2.

In addition, reference numeral 4 denotes an IF signal output from the IF amplifier 3 to be divided into an image intermediate frequency signal PIF and an audio intermediate frequency signal SIF, and include a surface acoustic wave filter (SAW Filter) and the like. / S separation unit, 6 is an image signal detector for detecting the image signal from the image intermediate frequency signal is separated and output from the P / S separation unit (4), 5 is output from the P / S separation unit (4) A voice signal detector detects a voice signal from a voice intermediate frequency signal.

On the other hand, reference numeral 7 is a remote control device for the viewer to adjust the output volume or remote control the overall device, and 8 is to receive the far-infrared signal transmitted from the remote control device 7 to convert it into an electrical signal 9 is a microcomputer used as a control unit for controlling the entire apparatus according to the contracted code signal output from the receiver 8, 10 is a video (V: Video) and an audio (R) output from an external device such as a VCR. A / V connection terminal for receiving: Right, L: Left signal, 11 is a signal received and processed by the antenna 1 according to a predetermined switching control signal from the microcomputer 9 and the A / V A / V switching unit for selectively switching the signal applied to the television via the connection terminal 10, 12 is a bass, treble, volume control, etc. for the audio signal output from the A / V switching unit A voice processing unit 13 for performing a voice effect process is a voice amplifier for amplifying the voice signal processed by the voice processing unit 12 and outputting it to the speaker 14 connected to the rear stage.

In addition, reference numeral 15 outputs predetermined OSD pattern data corresponding to the control signal according to the predetermined control signal from the microcomputer 9 to generate an OSD for informing the user of the overall operation of the device such as channel switching or volume control device. 16 is a device for adjusting brightness, tint, color, etc. of the video signal output from the A / V switching unit 11 according to a predetermined control signal from the microcomputer 9; An image processor for outputting R, G, B and luminance (Y) signals corresponding to the image signal, and 17 are R, G, B and luminance (Y) signals output from the image processor 17, and the OSD generator. A mixer for mixing and outputting R ', G', B 'and the OSD blanking signal Y' outputted from 15, 18 is an R, G, B and luminance Y signal outputted from the mixer 17. It is a CRT driving unit which drives the CRT 19 connected to the rear stage based on the above.

In the above configuration, when the viewer selects a channel using the remote controller 7 or the like, the microcomputer 9 outputs a control signal to the tuner 2 to tune to a specific broadcasting station, and tunes the tuner 2 by the tuner 2. The processed broadcast signal is processed by the image processor 16 and then output through the CRT 19.

However, in the related art, since the same broadcast station may be set to different channels at the same time, the same broadcast as the channel is first outputted even in a channel newly tuned by the viewer. For example, in the case of cable television, channels 59 and 61 are channels allocated to the same broadcasting station, and a case in which the viewer intentionally sets the same channel has occurred. Therefore, if the newly changed channel is the same channel as the first broadcast, there is an inconvenience that the viewer has to adjust the channel again in order to tune into another broadcasting station.

The present invention has been made to solve the above problems, and an object of the present invention is to output a different broadcast avoiding a channel where the same content as the channel before the change is output when the channel is changed to another channel by up / down the channel. The present invention provides a channel switching method of a television for preventing output of a redundant channel for selecting a channel to be used.

The channel switching method of the TV for preventing the duplicated output of the present invention for achieving the above object, the tuner (2) tunes a specific broadcast from the broadcast signal received by the antenna (1), and outputs from the tuner (2) An IF amplifying section 3 for amplifying the intermediate frequency signal IF and a IF video signal output from the IF amplifying section 3 into an image intermediate frequency signal PIF and an audio intermediate frequency signal SIF. A P / S separator 4, an image signal detector 6 for detecting an image signal from the PIF signal output from the P / S separator 4, and outputting the image signal to the switching unit 11, and a switching unit ( 11) an image processor 16 for processing R, G, B, and luminance signals outputted through the video signal output through the video signal, an image signal output from the image processor 16, and a control signal from the microcomputer 9; Mixer for synthesizing the characters output from the OSD generator 15 according to the CRT 19 (17), and in a television including a remote control device (7) for remote control, when a channel up / down key input by a viewer is detected, the microcomputer (9) outputs a control signal and outputs it from the image processing unit (16). A first step of storing the output data; A second step of tuning the broadcast tuned by the viewer by outputting a control signal from the microcomputer 9 to the tuner 2 after the output data is stored; A third step of storing the output data of the changed channel output from the image processor 16 after being tuned and output by the tuner 2 and being processed; A fourth step of comparing the previously changed channel data stored in the first step with the changed channel data stored in the third step in the microcomputer (9); And as a result of the comparison between the two channels in the microcomputer 9, the up / down channel is displayed through the CRT 19 if it is not the same channel data, and if the same channel data, the control signal is output from the microcomputer 9 to generate a third signal. And a fifth step of up / down to another channel and returning to the second step.

1 is a schematic configuration diagram of a television conventionally used;

2 is a flowchart for explaining a channel switching method of a television for preventing duplicate output of the present invention.

<Explanation of symbols for main parts of the drawings>

1: antenna, 2: tuner,

3: IF amplification part, 4: P / S separation part,

5: video signal detector, 6: audio signal detector,

7: remote control unit, 8: receiving unit,

9: microcomputer, 10: A / V connection terminal,

11: A / V switching unit, 12: audio processing unit,

13: voice amplifier, 14: speaker,

15: OSD generator, 16: image processing unit,

17: mixer, 18: CRT drive unit,

19: CRT, 20: memory part.

Hereinafter, referring to the accompanying drawings, a channel switching method of a TV for preventing duplicate output of the present invention will be described in detail.

In the method of the present invention, when the same broadcast station is set to be duplicated on different channels, when the viewer changes the channel, the same broadcast as the previous channel is prevented from being output again so that a new broadcast is output. This can be achieved by temporarily storing the channel output data after the change and comparing them with a microcomputer to determine whether they are identical.

The method of the present invention as described above can be configured using a conventional television as shown in FIG. 1, and the following steps: output data output from the image processor when a channel up / down key input by the viewer is detected. A first step of storing; A second step of tuning the broadcast tuned by the viewer after the output data is stored; A third step of storing the output data of the changed channel output from the image processor after being tuned and output by the tuner and being processed; A fourth step of comparing the changed channel data stored in the first step with the changed channel data stored in the third step; And a fifth step of displaying the up / down channel through the CRT if the same channel data is not the same as the comparison result of the two channel data, and up / down to a third other channel if the same channel data is returned. It is included.

A description with reference to the flowchart of FIG.

When the channel up / down key is pressed by the viewer, the microcomputer 9 detects a command input. After the command is detected, the microcomputer 9 does not output the control signal to the tuner 2 as in the prior art, but tunes the broadcasting station by the new channel, but stores the output data output from the image processor 16 first. That is, the image data is finally output from the image processor 16 before the channel is changed and input to the mixer 17. In the microcomputer 9, the memory unit 20 before the last image output data is output from the mixer 17. To save on. In the state where the last output data before the change in the memory unit 20 is stored, the microcomputer 9 outputs a control signal to the tuner 2 to tune to the channel newly set by the viewer.

In accordance with the control signal of the microcomputer 9, the tuner 2 tunes to a new broadcast station, amplifies the IF signal in the IF amplifier 3 as in the prior art, and then converts the video signal and the audio signal into the P / S separation unit 4. Print separately. The output voice signal is passed through the switching unit 11 after the voice signal is detected by the voice signal detector 5, and then processed by the voice processor 12 such as volume control, bass, treble, and the like. It is input to (13). The voice signal input to the voice amplifier 13 is amplified and finally output through the speaker 14 as audible sound.

On the other hand, the video signal separated by the P / S separator 4 is detected by the video signal detector 6 and then passed through the image processor 16 to the mixer 17. The image output data input by the new channel is stored in the memory unit 20 by the microcomputer 9 as described above. Therefore, the memory 20 stores both the output data before the channel change and the output data after the change at the same time.

In the state where the output data is stored as described above, the microcomputer 9 compares the stored data with each other. It will be apparent to those skilled in the art that this comparison can be performed using the microcomputer 9's own built-in comparator.

As a result of comparing the output data in the comparator of the microcomputer 9, if the two output data are found to be the same, the microcomputer 9 automatically performs channel up / down. That is, since the channel set by the viewer is the same channel as the first channel, the microcomputer 9 attempts to change the channel automatically in order to tune into a channel to which another broadcast is output. This channel change attempt can specify the up / down channel state in the program. That is, the viewer can automatically adjust the channel to be up if the channel is up, and if the channel is down, the channel is down.

After changing the channel as described above, the microcomputer 9 stores the newly input image output data in the memory unit 20. At this time, the output data newly stored after the channel change by the viewer is deleted and the third output data according to the channel newly set by the microcomputer 9 is stored. The third output data is output through the image processor 16 through the same process as described above. The output data newly stored in the memory unit 20 is compared with the first output data again.

As a result of the comparison, if the first stored output data and the newly stored third output data are not the same, the microcomputer 9 outputs the video and audio signals according to the up / down new channels by fixing the broadcast to the newly set channel. It is.

As described above, according to the present invention, when a channel is changed to another channel by up / down, the output of a duplicate channel for selecting a channel where another broadcast is output is avoided by avoiding a channel where the same content as the channel before the change is output. There is an advantage that can be.

Although the invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that modifications and variations can be made within the spirit and scope of the invention, and such variations or modifications will belong to the appended claims. .

Claims (2)

A tuner 2 for tuning a specific broadcast from the broadcast signal received by the antenna 1, an IF amplifier 3 for amplifying the intermediate frequency signal IF output from the tuner 2, and the IF amplification; A P / S separator 4 for separating the IF video signal output from the unit 3 into an image intermediate frequency signal PIF and an audio intermediate frequency signal SIF, and outputted from the P / S separator 4 The video signal detector 6 detects a video signal from the PIF signal to be output to the switching unit 11, and processes the video signal output through the switching unit 11 to output R, G, B, and luminance signals. A character output from the OSD generator 15 is synthesized according to the image processor 16 to be output, the image signal output from the image processor 16, and the control signal from the microcomputer 9 to be output to the CRT 19. In a television comprising a mixer 17 for controlling and a remote controller 7 for remote control, A first step of outputting a control signal from the microcomputer 9 to store the output data output from the image processor 16 when the channel up / down key input by the viewer is detected; A second step of tuning the broadcast tuned by the viewer by outputting a control signal from the microcomputer 9 to the tuner 2 after the output data is stored; A third step of storing the output data of the changed channel output from the image processor 16 after being tuned and output by the tuner 2 and being processed; A fourth step of comparing the previously changed channel data stored in the first step with the changed channel data stored in the third step in the microcomputer (9); And As a result of the comparison between the two channels in the microcomputer 9, if the same channel data is not displayed, the up / down channel is displayed through the CRT 19, and if the same channel data, the microcomputer 9 outputs a control signal to generate a third different signal. And a fifth step of up / down the channel and returning to the second step. 2. The television set according to claim 1, wherein output data corresponding to the video signal before the channel change and the video signal after the channel change are stored in the memory unit 20 accessed by the microcomputer 9. How to switch channels.